Pump



2 Sheets-Sheet 1 Jan. 1 6, 1945. R. J. BYROAD PUMP Filed Aug. 28, 1941 1 s 2 a Q W" MW!! IIIHJE R. J. BYROAD PUMP Jan. 16, 1945.

Filed Aug. 28, 1941 2 Sheets-Sheet 2 'INVENTOR 505.567' d. @V50/i0 Patented Jan. `16, 1945 vLIN-I TIED STATES 'PATENT y "O FFICE PUMP notam. Byroaa, Indianapolis, 1nd. Application August 28, 1941,'ser'ia1No. 498,591

v ".eclaimsf, 2(c1. loew-.1517) The "present :invention relatesy to .pumps .and is particularly 'concerned with 'transfer pumps .for handling gasoline, cil, and similar `materials which have .a deleterious eiect upon the ,parts of l standard-types of pumps. "The primary object ofv vthe invention'is .tofprovide a novel and improved double acting pump, so constructed as todevelop a 'maximum life v`in ther use 'for which itis 'intended. K I f To the "accomplishment of 'the above and related objects, my invention may be embodied in the form 'illustrated in the accompanying drawings, attention calledto the r.factjhoiweven that the drawings are illustrative' only, and that change may be made in the "specific construction illustrated and described,.so .long as the scope of `the appended claims is not violated. t

`Fig. 1 4is aside elevation .of a pump embodying the present invention, one-.half :thereoA-being Shown in vertical section;

Fig. 2y is a top plan view thereof Fig. 3 is a lfragmental .horizontallsection .taken .substantially on the lines A3---3 off Fig. t 1,; A,and

Fig. 4 is airagmental illustration of amodif fled form of construction. Referring more particularly to Figs. :l to .3., it will beseen that I have .illustrated a pump in- .chidingl a vcasing .element `indicated generally lby the reference numeral vI0 .and formed to provide l Van .inlet port il leading .from the exterior of the casing to .an .inlet chamber I2. Thecasing element L8 lis furtherormed to provide two .intake chambers `I3 .and M, .each `open at its side remote Y Vfrom the inlet chamber t2., The casing element is formed with -a perimetrallip .Lufer a purpose .later to 'become apparent. f

A port .t6 ,provides communication kbetween lthe 4 vinlet .chamber .L2 -and the intake-chamber I3, a .spider ITI being preferably press-fitted :into the 'portl and being Ormedto providela .central ,d aperture .I8 in .is reciprocably mounted vthe .stem1l9 of the check valve adapted `to seat on pin2l passingthrough `the stem`2'5 Llimits 'the upward movement of the valve .26 under '.the influence of .iiuid flowing from the chamber vI2 into the chamber I"4.

A mating casing Aelement indicated jgenerally by rthe reference numeral 28 is formed Ito pro- Yvide an outlet port 29 which, 'in the illustrated .embodiment of the invention, `ris axially aligned 'with the port I I, and which leads Afrom an outlei; vvchazrnber 30 to the exterior ofthe casing.

The casing element`28yis further vformedtc ',proy k vide two dischargeA chambers'3l `an'd`32which.,are

openat theirxsidesfremote from Athe chamber'30.

The `casing element-,281s formed with aperimetrai lip 33 adapted :to register with the 4lip I"5A`of the 'element I0, whereby the two casingelements canbe [clamped together by bolts 103 or other suitable fastening means.

The casing element 28 is formed with aport 34 providing communication between fthe chamber 3'I and the chamber 30, and a spider 35 is'preferably pyress-tted in said port, said spider pro viding a central aperture 3-6 in which `is reciprocably mounted the stem 31 of a -check valve 38 adapted to seatv upon theg'spider 35 to yprevent fluid flow froml the chamber 38 to the chamber 3 I.

j A pin 39 passing through the stem 31 limits `upward movement Vof the valve 38 under the in- Similarlya ,port 22 provides `commun-ication -between the chamber lf2 andthe chamber I4., a

.spider .23 .being preferably pre'ss-ii-tted into said `part 22.` andproviding .a central .aperture 24 in y.whicl'i isreciprccably mounted .the .stem25 of a valve 2li which `seats .on the spider 23 to prevent now from the chamber'lll tothe chamber I2. A

iiuence of viiuid .nowing from the chamber 13| into the chamber 3l). Similarly, the kcasing element `28 'is formed with 'sa port '40 'providing kcommunication` between the chamber .32 and the [chamber 3D, a 4spider 4I being preferably pressfitted in said port V48 and `.providing a central aperture 42 in which is reciprocably mounted'the stem 43 of la check valve "44 adapted to seat on the spider 4I to. close the port '48 against fluid vflow from the chamber 30 into the chamber 32. A pin 45 passes through the stem 43 to limit upward movement `oi the Valve 44 under 'the influence of fluid 'flowing from the chamber 32 into the chamber 30.

The elements I8 and L28 are formed with centrai ,partitions 46 and `IVI `respectively which cooperate,` when the entire [casing is assembled, to prevent uid 'flow between the two sections of the pump.. t

Interposed between the two casing elements IIJ .and 28, when the pump mechanism is assembled, is a continuous exible diaphragm `118, `generally separating the chambers. |3 and 3 nd the chambers I4r and 32, but formed with two ports 50 and 5I, the port-58 providing controlled 'communicaton between the chambers I3 and 3l and the port 5I providing controlled communication between the chambers I4 and 32. The perimetral portions 49 of the diaphnagm'48 are received between, and rmly clamped in place by, the

perimetral lips I5 and 33 of the respective cas-V ing elements I and 28.

Bounding the port 50 and within the chamber I3 there is a sheet metal annulus 52 in contact with -one surface of the diaphragm 48; the inner periphery of said annulus 52 being bent out of the general plane of the diaphragm 48 as indicated at 53, and the outer periphery of said annulus being similarly bent out of said plane as indicated at 54. Within the chamber 3| and contacting the opposite surface of the diaphragm 48 is a second sheet metal annulus 55, allochiral with the annulus 52, the inner periphery of said annulus 55 being bent out of the general plane of the diaphragm 48 as at 56 and the outer periphery thereof being similarly bent as at 51. This arrangement, while permitting ready fleXure of the diaphragm both inwardly of and outwardly of the portions gripped between the two annuli without the possibility of cutting the diaphragm against sharp edges of metal, nevertheless provides a support for a portion of the diaphragm closely surrounding the port I), through the medium of which the diaphragm can .be shifted to produce a pumping effect. The portion 56 of the annulus 55, being bent in the fashion shown, provides an annular, line-contact seat for a valve later to be described.

Within the chamber 3| is positioned a spider 58, each leg of which is provided with a foot 59 parallel with the diaphragm .48 and with the mid-portion of said spider, which mid-portion is spaced from the plane of the feet 59. Each of the feet 59 is formed with a perforation 68, and a fastening element 6| is projected through each of said perforations, and through both of the annuli 52 and 55 and the diaphragm 48 to re- Ceive a clamping element 62, the head of each fastening element engaging the upper surface of a foot 59, and each clamping element engaging the lower surface of the annulus 52. In the present illustration, I have shown the fastening elements 6| as bolts and clamping elements 62 as nuts threaded thereon; but it will be obvious that any other suitable form of fastening means may be used in place thereof, the requisite being that the fastening means used shall clamp the annuli and the spider feet against opposite surfaces of the diaphragm.

At its mid-point, the spider is perforated as at 63 to permit the penetration thereof by the end portion 64 of a plunger 65, that portion of the end 64 of the plunger which projects through the spider perforation 63 being preferably surrounded by a weld collar 66 which rigidly secures the plunger 65 to the spider 58, and which performs a further function later to be described. Reciprocably confined between the portion 56 of the annulus 55 and the mid-portion of the spider 58 spaced from the diaphragm 48,l is a valve 61 adapted to seat upon the portion 58 of the annulus 55 to close the port 50, and resiliently urged to seated position by a coiled spring 68 confined between said valve 61 and the mid-portion of the spider 58. It will be clearly seen that one end of the spring 68 abuts the valve 61, while the opposite end 69 thereof snugly surrounds the weld llar 66 and abuts the mid-portion of the spide 8, whereby said spring is held against accidental dislodgment.

The casing element 28 is formed with a bore 1D aligned with the perforations 63 of the spider 75 58, and said plunger 65 is recip-rocably mounted in said bore, projecting therethrough to the eX- terior of the casing. A packing gland 'II preferably surrounds the outer portion of the plunger 65.

Very similarly, the port 5| is bounded by a sheet metal annulus 12 having its inner and outer peripheries 13 and 14 bent out of the plane of the diaphragm, and by a similar annulus 15 having its portions 16 and 11 similarly bent out of said plane. A spider 18 similar to the spider 56 has its feet I9 perforated as at 88 for the reception of fastening elements 8|, which project through said feet, both annuli, and the diaphragm terminating in clamping means 82. In this instance, Ihave illustrated headed rivets as the means for securing the annuli and the spider to the diaphragm.

The spider 18 is perforated as at 83 for the reception of the portion 84 of the plunger 85, said portion 84 being secured to the spider by a weld collar 86; and a valve 81 is reciprocably con fined between ther sp-ider 18 and the annular seat formed by theportion 16 of the annulus 15, a spring 88 abutting said valve 81 and being sleeved on the collar 86 inthe manner described hereinabove. The casing element 28 is formed with a vbore 98 parallel with the bore 16, in which the plunger is reciprocably mounted, and a packing gland 9| surrounds theouter portion of said plunger 85.

The casing element 28 carries a pair of ears 92 supporting a trunnion 93 upon which is oscillably mounted an operating lever 94. To the outer end of the plunger 65 is secured a tting 95 to which is pivoted one end of a link 96, the opposite end of said link being pivoted to the end portion 91 of the lever 94. Similarly, a tting 98 is secured to the outer end of the plunger 86 and the link 99 has one end pivoted to the tting 98 and its other end pivoted to the portion |66 of the lever 94. Obviously, oscillation of the lever 94' about its pivotal axis 93 will result in opposite reciprocation'of the plungers 65 and 85 The casing element ||I is preferably provided with drain ports IUI normally closed by threaded plugs |02.

It will be obvious that, if the inlet port is connected with a source of fluid (said port being surrounded by a threaded spud |04 to facilitate the attachment of a lead line thereto) and if the lever 94 is swung in a counter-clockwise direction about its pivotal axis 93, that portion of the diaphragm within the chamber |3-3I willfbe depressed, while that portion of the diaphragm within the chamber |4-32 will be elevated. Depression of the first-mentioned portion of the diaphragm will cause a reduction in the volume of the chamber I3 and an increase in the volume of the chamber 3|, whereby fluid in the chamber |3 will be caused to elevate the valve 61 against the tendency of the spring 68 and to flow into the chamber 3|. Elevation of the diaphragm portion Within the chamber |4-32 will increase the volume of the chamber |4 and decrease the volume of the chamber 32, whereby fluid in the chamber 32 will be caused to elevate the valve 44 and flow into the chamber 30; and whereby a partial vacuum will be created in the chamber |4 to cause fluid in the chamber |2 to elevate the valve 26 and to flow into the chamber I4, whereby, of course, iiuid If, now, the lever 94 is swung in a clockwise direction about the pivotal axis 93 thereof, the

diaphragm portionwithin the chamber l3-3l will be elevated and the diaphragm portion with- 1 in the chamber I4-32 will be depressed. Thereby, fluid will be caused to flow from the chamber l2, to elevate the valve 20, and to flow into the chamber I3, fiuid in the chamber 3| will be forced pastA the valve 38 into the chamber`3l) to expel therefrom uid formerly in that chamber through the port 29, and fluid in the chamber I4 will be forced past thevalve 81 into the chamber 32.

The material selected for the diaphragm 48 will depend, of course, upon the use to which the pump is to be put; but it is my present belief that, particularly for use in connection with oils, gasoline, and the like, the commercial synthetic product known as Neoprene is the best available material.

`let port 29' is formed at the side of the outlet chamber 30, instead of at the top thereof.

`Because of the use of a diaphragm for varying the volumes of the intake and discharge chambers, in place of a packed'piston, there is nothing in'my pump corresponding to the piston glands of a reciprocating pump which can damage the efficiency of the pump when dried out. And because my valves 61 and 81 seat upon the line-contact elements 56 and 16, drying out of the valve elements themselves will not materially alfect the efficiency of the pump. Consequently, even though my pump may stand idle for relatively long periods,` it will operate effectively when it is again put into use.

I claim as my invention:

1. A pump comprising a housing formed to provide an'iintake chamber and a discharge chamber, a flexible diaphragm separating said chambers, and formed with a port therethrough, a spider bridging said port and secured to said diaphragm within said discharge chamber, the

v mid-portion of said spider being spaced from said diaphragm, a valve confined within the space between said spider mid-portion and said diaphragm and operable to close said port, a plunger penetrating said spider mid-portion, operatively connected thereto, and projecting into Asaid space, said plunger likewise extending through said discharge chamber to the exterior of said housing, and a coiled spring confined between said valve and said spider, one end of said spring abutting said valve and the other end of said spring enveloping the projecting portion of said plunger and abutting said spider.

2. A pump comprising a housing formed to chambers, and formed with a port therethrough, t

a spider bridging said port and secured to said diaphragm within said discharge chamber, the

mid-portion of said spider being spaced fromv said diaphragm, a valve conned within the space between said spider mid-portion and said diaphragm and operable to close said port, a plunger penetrating said spider mid-portion and projecting into said space, said plunger likewise extending through said discharge chamber to the eX- terior of said housing, weld material forming a provide an intake chamber and a discharge` collar inside said spider surrounding and securing the projecting portion of said plunger to said spider, and a coiled spring confined between said valve and said spider, one end of said spring abutting said valve and the other end of said spring being sleeved on said collar and abutting said collar, whereby said spring is supported against displacement.

3. In a pump, a first casing element formed to provide an inlet chamber and an inlet port leading from outside said casing to said inlet chamber, and two intake chambers open at their sides remote from said inlet chamber, said casing element being formed with two intake ports leading respectively from said inlet chamber to said two intake chambers, check valves associated with said ports to prevent flow from said intake chambers to said inlet chamber, a mating casing element formed to provide-anoutlet chamber and an outlet port leading from said outlet chamber to the exterior of said casing, and two discharge chambers open at their sides remote from said outlet chamber, said mating casing element being formed with two discharge ports leading respectively from said discharge chambers to said outlet chamber, check valves associated with said discharge ports to prevent ow from said outlet chamber to said discharge chambers, means securing said two casing elements together with their open sides in facing relation, a flexible diaphragm interposed between said casing elements and clamped in place therebetween, said diaphragm being formed with -two ports therethrough, and one of said ports being disposed between one intake chamber and its associated discharge chamber while the other of said ports is disposed between the other intake chamber and its associated discharge chamber, spring-pressed yValve means associated with each of said ports and operable to prevent fluid flow from either dischargechamber to its associated intake*y chamber while permitting flow in an opposite direction, and two plungers, each operatively associated with said diaphragm near one of said ports and each projecting through said lastmentioned casing element to the exteriorthereof, and means for reciprocating said plungers.

ROBERT J. BYROAD. 

